Enhanced Emission from WSe2 Monolayers Coupled to Circular Bragg Gratings

Ngoc My Hanh Duong; Zai-Quan Xu; Mehran Kianinia; Rongbin Su; Zhuojun Liu; Sejeong Kim; Carlo Bradac; Toan Trong Tran; Yi Wan; Lain-Jong Li; Alexander Solntsev; Jin Liu; Igor Aharonovich

doi:10.1021/acsphotonics.8b00865

Enhanced Emission from WSe2 Monolayers Coupled to Circular Bragg Gratings

Ngoc My Hanh Duong, Zai-Quan Xu, Mehran Kianinia, Rongbin Su, Zhuojun Liu, Sejeong Kim, Carlo Bradac, Toan Trong Tran, Yi Wan, Lain-Jong Li, Alexander Solntsev, Jin Liu, Igor Aharonovich

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35 Scopus citations

Abstract

Two-dimensional transition-metal dichalcogenides (TMDC) are of great interest for on-chip nanophotonics due to their unique optoelectronic properties. Here, we propose and realize coupling of tungsten diselenide (WSe) monolayers to circular Bragg grating structures to achieve enhanced emission. The interaction between WSe and the resonant mode of the structure results in Purcell-enhanced emission, and the symmetric geometrical structure improves the directionality of the out-coupling stream of emitted photons. Furthermore, this hybrid structure produces a record high contrast of the spin valley readout (>40%) revealed by the polarization-resolved photoluminescence (PL) measurements. Our results are promising for on-chip integration of TMDC monolayers with optical resonators for nanophotonic circuits.

Original language	English (US)
Pages (from-to)	3950-3955
Number of pages	6
Journal	ACS Photonics
Volume	5
Issue number	10
DOIs	https://doi.org/10.1021/acsphotonics.8b00865
State	Published - Sep 10 2018

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@article{bff22b9027e943128c5708b966977737,

title = "Enhanced Emission from WSe2 Monolayers Coupled to Circular Bragg Gratings",

abstract = "Two-dimensional transition-metal dichalcogenides (TMDC) are of great interest for on-chip nanophotonics due to their unique optoelectronic properties. Here, we propose and realize coupling of tungsten diselenide (WSe) monolayers to circular Bragg grating structures to achieve enhanced emission. The interaction between WSe and the resonant mode of the structure results in Purcell-enhanced emission, and the symmetric geometrical structure improves the directionality of the out-coupling stream of emitted photons. Furthermore, this hybrid structure produces a record high contrast of the spin valley readout (>40%) revealed by the polarization-resolved photoluminescence (PL) measurements. Our results are promising for on-chip integration of TMDC monolayers with optical resonators for nanophotonic circuits.",

author = "Duong, {Ngoc My Hanh} and Zai-Quan Xu and Mehran Kianinia and Rongbin Su and Zhuojun Liu and Sejeong Kim and Carlo Bradac and Tran, {Toan Trong} and Yi Wan and Lain-Jong Li and Alexander Solntsev and Jin Liu and Igor Aharonovich",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: The authors are thankful for financial support from the Australian Research council (via DP180100077, DE180100070, DE 1801100810), the Asian Office of Aerospace Research and Development grant FA2386-17-1-4064, the Office of Naval Research Global under grant number N62909-18-1-2025, National Key R & D Program of China (Grants No. 2018YFA0306100), the National Natural Science Foundation of China (Grant No. 11874437), Guangzhou Science and Technology project (Grant No. 201805010004). This research is supported by an Australian Government Research Training Program Scholarship.",

year = "2018",

month = sep,

day = "10",

doi = "10.1021/acsphotonics.8b00865",

language = "English (US)",

volume = "5",

pages = "3950--3955",

journal = "ACS Photonics",

issn = "2330-4022",

publisher = "AMER CHEMICAL SOC",

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TY - JOUR

T1 - Enhanced Emission from WSe2 Monolayers Coupled to Circular Bragg Gratings

AU - Duong, Ngoc My Hanh

AU - Xu, Zai-Quan

AU - Kianinia, Mehran

AU - Su, Rongbin

AU - Liu, Zhuojun

AU - Kim, Sejeong

AU - Bradac, Carlo

AU - Tran, Toan Trong

AU - Wan, Yi

AU - Li, Lain-Jong

AU - Solntsev, Alexander

AU - Liu, Jin

AU - Aharonovich, Igor

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: The authors are thankful for financial support from the Australian Research council (via DP180100077, DE180100070, DE 1801100810), the Asian Office of Aerospace Research and Development grant FA2386-17-1-4064, the Office of Naval Research Global under grant number N62909-18-1-2025, National Key R & D Program of China (Grants No. 2018YFA0306100), the National Natural Science Foundation of China (Grant No. 11874437), Guangzhou Science and Technology project (Grant No. 201805010004). This research is supported by an Australian Government Research Training Program Scholarship.

PY - 2018/9/10

Y1 - 2018/9/10

N2 - Two-dimensional transition-metal dichalcogenides (TMDC) are of great interest for on-chip nanophotonics due to their unique optoelectronic properties. Here, we propose and realize coupling of tungsten diselenide (WSe) monolayers to circular Bragg grating structures to achieve enhanced emission. The interaction between WSe and the resonant mode of the structure results in Purcell-enhanced emission, and the symmetric geometrical structure improves the directionality of the out-coupling stream of emitted photons. Furthermore, this hybrid structure produces a record high contrast of the spin valley readout (>40%) revealed by the polarization-resolved photoluminescence (PL) measurements. Our results are promising for on-chip integration of TMDC monolayers with optical resonators for nanophotonic circuits.

AB - Two-dimensional transition-metal dichalcogenides (TMDC) are of great interest for on-chip nanophotonics due to their unique optoelectronic properties. Here, we propose and realize coupling of tungsten diselenide (WSe) monolayers to circular Bragg grating structures to achieve enhanced emission. The interaction between WSe and the resonant mode of the structure results in Purcell-enhanced emission, and the symmetric geometrical structure improves the directionality of the out-coupling stream of emitted photons. Furthermore, this hybrid structure produces a record high contrast of the spin valley readout (>40%) revealed by the polarization-resolved photoluminescence (PL) measurements. Our results are promising for on-chip integration of TMDC monolayers with optical resonators for nanophotonic circuits.

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U2 - 10.1021/acsphotonics.8b00865

DO - 10.1021/acsphotonics.8b00865

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EP - 3955

JO - ACS Photonics

JF - ACS Photonics

IS - 10

ER -

Enhanced Emission from WSe2 Monolayers Coupled to Circular Bragg Gratings

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